let person = {username:'贾队长',age:35}
// let someone = person//引用传递，如果使用这个两个都改成黄金标
let someone = {...person}
console.log(person)//贾队长
console.log(someone)//贾队长
someone.username = '黄金标'
console.log(person)//贾队长
console.log(someone)//黄金标